文档介绍：RLC电路频率特性的实验研究
学号密级
兰州城市学院本科毕业论文
学院名称:培黎工程技术学院专业名称:物理学
学生姓名:关进京
指导教师:赵磊讲师
二○一四年五月
BACHELOR'S DEGREE THESIS OF LANZHOU CITY UNIVERSITY
Experimental study of the frequency characteristics of the RLC circuit
College :School of Bailie Engineering & Technology Subject :physics
Name :Guan Jinjing
Directed by :Zhao Lei lecture
May 2014
郑重声明
本人呈交的学位论文,是在导师的指导下,独立进行研究工作所取得的成果,所有数据、图片资料真实可靠。尽我所知,除文中已经注明引用的内容外,本学位论文的研究成果不包含他人享有著作权的内容。对本论文所涉及的研究工作做出贡献的其他个人和集体,均已在文中以明确的方式标明。本学位论文的知识产权归属于培养单位。
本人签名: 日期:
I
摘要 RLC电路是一种由电阻(R)、电感(L)、电容(C)组成的电路结构。由于R、L、C对电路中激励有不同的响应,使得初学者对其基本规律难以掌握。本文先从理论方面对RLC电路的基本规律做了归纳和推导,重点对RLC中谐振特性做出了说明,使初学者对其规律有全面认识;接着用实验的方法,探究了RLC谐振电路的特性,重点对于谐振中的品质因数(Q)值进行了细致研究,电路品质因数Q 值的物理意义在于揭示了电路谐振程度的强弱,体现电路对信号源频率的选择性以及电路中无功功率对有功功率的比例。充分理解谐振和品质因数的物理含义对掌握和应用其原理起到事半功倍的效果,为初学者和《电工学实验》的顺利进行提供有力借鉴。
关键词:RLC电路;谐振;品质因数Q
II
ABSTRACT
RLC circuit posed of resistance (R), inductor (L) and capacitance (C). Because of R, L, C’s different responses to excitation, it es hard for beginners to grasp the basic law. This paper started from the conclusion and derivation of the basic law of RLC circuit theoretically, and focused on the description of the RLC resonant characteristics, to make beginners have prehensive understanding. With experimental methods, this paper explored the characteristics of the RLC resonant circuit, especially studied the quality factor (Q) value in resonance carefully. The physical significance of the
Q value is it reveals the strength of the degree of resonant circuit and shows the selectivity of the circuit to signal source frequency, also the active power to the reactive power ratio. To grasp and apply the principles of the quality factor of resonance, it will get twice the result with half the effort through fully understand the physical meaning of that. This paper provided strong references for beginners and the smooth progress of the electrotechnics experiment.
Key words: RLC circuit;resonance;Quality factor;